<div id="header">
  <div class="head_box">
    <ul id="topmenu" class="left">
      <li><a href="#">首页</a></li>
      <li><a href="#">供求</a></li>
      <li><a href="#">知道</a></li>
      <li><a href="#">商城</a></li>
    </ul>
    <div id="search" rel="targetBox">
      <div class="left" id="selected">选择分类</div>
      <input type="text" name="search" value="" size="25" />
      <input class="sea_but" type="image" src="{$images_path}/search.png" />
    </div>
    <div id="Remind">(3)个消息提醒</div>
  </div>
</div>